I don't think the games will be that big either.
You guys are getting scared by PS4/XB1/PC game sizes, NS is not going to be in that power range IMO, something 2.5x a PS3/360/Wii U is about what you're going to get with a Switch, games will be considerably smaller as a result.
That Mario Switch game they showed looked marginally better than a Wii U game, not even close to a generational leap.